U.S. patent application number 14/541837 was filed with the patent office on 2015-07-02 for control circuit for management engine interface.
The applicant listed for this patent is HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (WuHan) CO., LTD.. Invention is credited to CHUN-SHENG CHEN, SONG GUO.
Application Number | 20150188535 14/541837 |
Document ID | / |
Family ID | 53483067 |
Filed Date | 2015-07-02 |
United States Patent
Application |
20150188535 |
Kind Code |
A1 |
GUO; SONG ; et al. |
July 2, 2015 |
CONTROL CIRCUIT FOR MANAGEMENT ENGINE INTERFACE
Abstract
A control circuit includes a platform controller hub (PCH), a
basic input/output system (BIOS), an electronic switch, and first
and second resistors. A management engine interface is loaded in
the PCH. The BIOS is connected to the PCH to control the signals
output from a general input/output (GPIO) pin of the PCH. A power
supply is connected to a serial pin of the PCH through the
electronic switch. The GPIO pin of the PCH controls on or off of
the electronic switch.
Inventors: |
GUO; SONG; (Wuhan, CN)
; CHEN; CHUN-SHENG; (New Taipei, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HONG FU JIN PRECISION INDUSTRY (WuHan) CO., LTD.
HON HAI PRECISION INDUSTRY CO., LTD. |
Wuhan
New Taipei |
|
CN
TW |
|
|
Family ID: |
53483067 |
Appl. No.: |
14/541837 |
Filed: |
November 14, 2014 |
Current U.S.
Class: |
327/478 |
Current CPC
Class: |
G06F 9/4401 20130101;
G06F 1/16 20130101; G06F 21/572 20130101; H03K 17/60 20130101 |
International
Class: |
H03K 17/60 20060101
H03K017/60 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 27, 2013 |
CN |
201310734479.7 |
Claims
1. A control circuit for a management engine interface, the control
circuit comprising: a platform controller hub (PCH); a management
engine interface loaded in the PCH; a basic input-output system
(BIOS) coupled to the PCH and controlling an outputted signal of a
general purpose input output (GPIO) pin of the PCH; a first
resistor; a second resistor; and a electronic switch; wherein the
GPIO pin of the PCH is coupled to a power supply through the first
resistor; and wherein a control terminal of the electronic switch
is coupled to the GPIO pin of the PCH, a first terminal of the
electronic switch is coupled to a serial pin of the PCH, and a
second terminal of the electronic switch is coupled to the power
supply through the second resistor.
2. The control circuit of claim 1, wherein the electronic switch is
an NPN bipolar junction transistor.
Description
FIELD
[0001] The subject matter herein generally relates to control
circuits for management engine interface.
BACKGROUND
[0002] Management engine interface, which is loaded in a platform
controller hub (PCH), is usually protected for safety. This can be
problematic when the management engine interface needs to be
updated.
BRIEF DESCRIPTION OF THE DRAWING
[0003] Implementations of the present technology will now be
described, by way of example only, with reference to the attached
FIGURE.
[0004] The FIGURE is a circuit diagram of an embodiment of a
control circuit for management engine interface.
DETAILED DESCRIPTION
[0005] It will be appreciated that for simplicity and clarity of
illustration, where appropriate, reference numerals have been
repeated among the different figures to indicate corresponding or
analogous elements. In addition, numerous specific details are set
forth in order to provide a thorough understanding of the
embodiments described herein. However, it will be understood by
those of ordinary skill in the art that the embodiments described
herein can be practiced without these specific details. In other
instances, methods, procedures and components have not been
described in detail so as not to obscure the related relevant
feature being described. Also, the description is not to be
considered as limiting the scope of the embodiments described
herein. The drawings are not necessarily to scale and the
proportions of certain parts may be exaggerated to better
illustrate details and features of the present disclosure.
[0006] Several definitions that apply throughout this disclosure
will now be presented.
[0007] The term "coupled" is defined as connected, whether directly
or indirectly through intervening components, and is not
necessarily limited to physical connections. The connection can be
such that the objects are permanently connected or releasably
connected. The term "comprising," when utilized, means "including,
but not necessarily limited to"; it specifically indicates
open-ended inclusion or membership in the so-described combination,
group, series and the like.
[0008] The present disclosure is described in relation to a control
circuit 100.
[0009] The FIGURE illustrates an embodiment of the control circuit
100. The control circuit 100 can comprise a platform controller hub
(PCH) 10, a basic input-output system (BIOS) 20, an electronic
switch Q, a resistor R1, and a resistor R2.
[0010] A management engine interface 12 is loaded in the PCH 10.
The BIOS 20 is coupled to the PCH 10. An outputted signal of a
general purpose input output (GPIO) pin P0 of the PCH 10 is
controlled by the BIOS 20. The GPIO pin P0 of the PCH 10 is coupled
to a power supply P3V3 through the resistor R1. A control terminal
of the electronic switch Q is coupled to the GPIO pin P0 of the PCH
10. A first terminal of the electronic switch Q is coupled to a
serial pin SDO of the PCH 10. A second terminal of the electronic
switch Q is coupled to the power supply P3V3 through the resistor
R2.
[0011] The BIOS 20 controls the GPIO pin P0 of the PCH 10 to output
a low level signal when the management engine interface 12 needs to
be updated. The electronic switch Q is turned off. The serial pin
SDO of the PCH 10 receives no signal. Write protect function of the
management engine interface 12 is opened. Then the management
engine interface 12 can be updated.
[0012] No signal is outputted from the GPIO pin P0 of the PCH 10
when the management engine interface 12 is normal and no update is
required. The electronic switch Q receives a high level signal from
the power supply P3V3 and is turned on. The serial pin SDO of the
PCH 10 receives a high level signal and the management engine
interface 12 is in a state of being protected.
[0013] In at least one embodiment, the electronic switch Q can be
an NPN bipolar junction transistor.
[0014] The embodiment shown and described above is only examples.
Even though numerous characteristics and advantages of the present
technology have been set forth in the foregoing description,
together with details of the structure and function of the present
disclosure, the disclosure is illustrative only, and changes may be
made in the detail, especially in matters of shape, size and
arrangement of the parts within the principles of the present
disclosure up to, and including the full extent established by the
broad general meaning of the terms used in the claims. It will
therefore be appreciated that the embodiments described above may
be modified within the scope of the claims.
* * * * *